Chimney construction



Dec. 2s, 194s. E. o. HOWLE 2,457,471

CHIMNEY CONSTRUCTION Filed Dec. 5, 1945 Eff/W W. M55 @MW/e;

Patented Dec. .28, 1948 U N'ITED 'STAT ES @ICE nH'IMNEY coNstrnUCnIIoN yErnest 0. Howleyliicagolll. .Application December 5, 1945,.s,eee1No632,864

(C1. 'zz-94) f4 fClims.

The present invention relates `to a .Chimney construction, and particularly i;to .,one fOrilSe .1in carrying away the products of combustionfrom intermittently fired fheatcrs,z.and.has for its principal `object means for ,preventing condensation ofthe products of combustion.

An object of the present invention is to provide a chimney construction wherein the products of combustion are prevented from condensing and wherein the stack temperature is maintained at a high level.

The present invention will be readily understood from the following description and accompanying drawing.

Fig. l is a vertical sectional view of a chimney constructed in accordance with the principles of the present invention;

Fig. 2 is a top line View of the chimney; and

Fig. 3 is a fragmental elevational view of the lower end of the chimney.

The chimney comprises an outer casing 5 of brick or the like, and dening an inner passageway 5 from the bottom to the top of the brickwork. This space is lined with a metalliclner 1 which extends from the bottom to the top of the brickwork.

Inwardly spaced from the liner 1, is the flue designated generally as A, and shown as comprising a plurality of sections of vitrified enameled metal arranged one on top of another, the sections being provided with modified bell and spigot joints for assembling the flue in stack formation.

The lower section 8 has a bottom I0 and a lateral take-off ll which projects through a suitable opening in the brickwork whereby a heater may be connected to the flue. A drain pipe l2 leads from the lower portion of the interior of the section 8 through the brick wall for connection to the sewer.

The other sections l9 are all similar.

The upper end of the chimney is closed by a cap i3 which is made preferably of cementitious material supported on a hanger I4 suspended from the upper end of the liner and surrounding the upper end of the ue.

The construction is such that a space l5 of substantial amount is provided between the nue A and the liner 1.

The liner 1 is made of a relatively thin metal which does not absorb heat to any :considerable extent.

The space l5 between the flue and the liner is lled with nely ground aluminum silicate, which 1s a heat insulator.

' The .'fact .that thetemperature of the flue is `insulated from the brickwork 5 bythe insulated space l5 A.means that very little heat escapes through theliner 'l to the brickwork. Whatever heat does escape is absorbed by the brick.

Inasmuch, therefore, v,as the .heat `escaping from the flueisnot absorbedbythe surrounding brickwork or the like, .thetemperature within-the flue vis maintained at a point suiiciently high to prevent condensation of the products of combustion. In other Words, the temperature of the gases of combustion es-caping through the top of the flue is much higher than it would be if the flue were encased by brick or some other absorbent material.

It has been found that a chimney of the character of the present invention, when used for intermittently red heaters, creates a stack temperature of more than sufficient amount to Vaporize the products of combustion and carry away such vaporized products as gas to the atmosphere.

It will thus be noted that a chimney constructed as herein described maintains the flue gases at temperatures in excess of the condensation temperatures of the gases, so that at all times the gases are prevented from condensing.

The drain I2 is provided to enable any rain water that might enter the top of the flue to drain oi into the sewer.

It has been found that should moisture accumulate in the lower end of the iiue, occasioned by rain water, melting snow or the like, the neXt time the heater is operated, the moisture will be quickly condensed and carried away to the atmosphere.

The brick chimney 5, or a chimney constructed of other suitable material, is heat resistant so that the major portion of the heat created within the casing 1 is transmitted to the flue, thus maintaining the temperatures of the flue gases at high points.

The invention is claimed as follows:

1. Chimney construction including a casing of brick or the like, a non-heat absorbent liner for the casing, a metallic ue spaced from the said liner and arranged with its lower end above the lower end of the casing, said flue having a closed bottom, a take-off for connection to a heater extending laterally from the flue and through the casing, and a ller of nely ground aluminum silicate below the lower end of thel flue and occupying all of the space between the bottom of the casing and the lower end of the flue and all of the space between the lue and said casing liner.

2. Chimney construction including a casing` of brick or the like, a non-heat absorbent liner for the casing, a metallic ue spaced from the said liner and arranged with its lower end above the lower end of the casing, said ue having a closed bottom, a take-off for connection to a heater extending laterally from the ue and through the casing, a filler of finely ground aluminum silicate below the lower end of the flue and of the casing and the lower end of the ilue and all of the space between the flue and said casing liner, and a cap of cementitious material overlying the upper end of the casing and sur;-r rounding the upper end of the llue,y a portion of said cap resting on the upper end of the linen` 3. A chimney construction including a casing of Ybrick or the like, a non-heat absorbent liner for the casing, a metallic ue spaced from said liner and arranged with its lower end terminating above the lower end of the casing, said flue having a closed bottom and having a lateral take-off for connection to a heater, anda filler of insulating material such as aluminum silicate the space below and around the bottom of the flue and between the ue and the liner.

4. A chimney construction including a casing of brick or the like, a non-heat absorbent liner for the casing, a metallic flue within said casing and having a lateral connection for a heater, the bottom of said flue being spaced above the bottom of the casing, and ne particles of an insulating material such as aluminum silicate occupying all of the space about the flue from the topof said liner to thefbottom.. of the casing.

ERNEST O.`HOWLE.

occupying all of the space between the bottom",,1;2VA REFERENCES CITED The following references are of record in the 'le 'of this patent:

` "UNITED STATES PA'IENTS Number "yName l Date `185,479 Rathbun Nov. 1, 1892 500,779 Savage July 4, 1893 20 512,707 v Jarvis Jan. 16, 1894 1,608,128 Lllbyy NOV. 23, 1926 n 3,381,548, vMcLaughlin Aug. v, 1945 S t, FOREIGN PATENTS 5 Number i vCountry Date Great Britain` 1931 

